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package Torello.Java;

import Torello.Java.Function.IntTFunction;

class TArr1D
{
    static <T> String toCSV1
        (T[] tArr, int sPos, int ePos, boolean trim, boolean printNulls, Integer maxLength)
    {
        LV              l       = new LV(tArr, sPos, ePos);
        StringBuilder   sb      = new StringBuilder();
        boolean         first   = true;

        if (trim && printNulls)

            for (int i=l.start; i < l.end; i++)
            {
                if (tArr[i] == null)
                    sb.append((first ? "" : ", ") + "null");
                else
                    sb.append((first ? "" : ", ") + tArr[i].toString().trim());

                first = false;
            }

        else if (trim && (! printNulls))

            for (int i=l.start; i < l.end; i++)
            {
                sb.append((first ? "" : ", ") + tArr[i].toString().trim());
                first = false;
            }

        else if ((! trim) && printNulls)

            for (int i=l.start; i < l.end; i++)
            {
                if (tArr[i] == null)
                    sb.append((first ? "" : ", ") + "null");
                else
                    sb.append((first ? "" : ", ") + tArr[i].toString());

                first = false;
            }

        else // !trim !printNulls

            for (int i=l.start; i < l.end; i++)
            {
                sb.append((first ? "" : ", ") + tArr[i].toString());
                first = false;
            }

        if ((maxLength != null) && (sb.length() > maxLength.intValue()))
        {
            sb.setLength(maxLength - 4);
            sb.append(" ...");

            return sb.toString();
        }

        return sb.toString();
    }


    static <T> String toCSV2(
            T[] tArr, int sPos, int ePos, IntTFunction<? super T, String> toString,
            boolean printNulls, Integer maxLength
        )
    {
        LV              l   = new LV(tArr, sPos, ePos);
        StringBuilder   sb  = new StringBuilder();
        int             i   = l.start;
        String          s;

        if (printNulls)
        {
            for (; i < l.end; i++)
                if ((s = toString.apply(i, tArr[i])).length() > 0)
                    { sb.append(s); break; }

            for (i++; i < l.end; i++)
                if ((s = toString.apply(i, tArr[i])) == null)   StrCSV.throwNPE(i, tArr[i]);
                else                                            sb.append(", " + s);
        }

        else
        {
            for (; i < l.end; i++)
                if ((tArr[i] != null) && ((s = toString.apply(i, tArr[i])).length() > 0))
                    { sb.append(s); break; }

            for (i++; i < l.end; i++)
                if (tArr[i] != null)
                    if ((s = toString.apply(i, tArr[i])) == null)   StrCSV.throwNPE(i, tArr[i]);
                    else                                            sb.append(", " + s);
        }

        if ((maxLength != null) && (sb.length() > maxLength.intValue()))
        {
            sb.setLength(maxLength - 4);
            sb.append(" ...");

            return sb.toString();
        }      

        return sb.toString();
    }
}